AWK: Remove duplicated lines in

作者: cutelittlePanda | 来源:发表于2018-03-20 11:05 被阅读0次

1). !($0 in array) : if the entire line Not in the array, then;

2). {array[$0]; print} : put the entire line into the array as a element, then print it out, meanwhile;

3). {cnt++; print cnt} : count the new line numbers, then print out the count num.

======In short, the same as: >

a). !a[$0]: if a[$0] not already exists in the array a[], print it out, then;

b). (!a[$0])++ : move to next line;

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